Prelims Mantra (Practice Questions) (23/12/2025)
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Prelims Mantra (Practice Questions) (23/12/2025)
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Question 1 of 7
1. Question
Which of the following treaties was formulated under the framework of UNCOPUOS?
Correct
Answer: B
Explanation:
The Outer Space Treaty, 1967, which lays down principles such as non-appropriation of outer space and peaceful use, was negotiated under UNCOPUOS. Other options relate to arms control or polar governance, not space law.
Incorrect
Answer: B
Explanation:
The Outer Space Treaty, 1967, which lays down principles such as non-appropriation of outer space and peaceful use, was negotiated under UNCOPUOS. Other options relate to arms control or polar governance, not space law.
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Question 2 of 7
2. Question
Kessler Syndrome is best described as:
Correct
Answer: D
Explanation:
Kessler Syndrome refers to a self-sustaining chain reaction of collisions among space objects, primarily in LEO, producing more debris and further collisions.
Incorrect
Answer: D
Explanation:
Kessler Syndrome refers to a self-sustaining chain reaction of collisions among space objects, primarily in LEO, producing more debris and further collisions.
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Question 3 of 7
3. Question
Which of the following factors most directly increases the risk of Kessler Syndrome?
Correct
Answer: C
Explanation:
High object density in LEO, especially due to mega-constellations, raises collision probability. Solar activity and reusable launch vehicles are not primary drivers.
Incorrect
Answer: C
Explanation:
High object density in LEO, especially due to mega-constellations, raises collision probability. Solar activity and reusable launch vehicles are not primary drivers.
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Question 4 of 7
4. Question
Which of the following capabilities is most closely associated with vessels like Anjadip?
1. Detection of submarines using sonar
2. Mine-laying in coastal waters
3. Long-range ballistic missile launch
Select the correct answer using the code below:
Correct
Answer: B
Explanation:
Sonar-based submarine detection (1) is a core function.
Mine-laying is a known capability of ASW-SWCs.
Ballistic missile launch is associated with SSBNs, not shallow-water crafts.
Incorrect
Answer: B
Explanation:
Sonar-based submarine detection (1) is a core function.
Mine-laying is a known capability of ASW-SWCs.
Ballistic missile launch is associated with SSBNs, not shallow-water crafts.
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Question 5 of 7
5. Question
With reference to the Index of Eight Core Industries, consider the following statements:
1. It is released by the Ministry of Statistics and Programme Implementation.
2. It uses 2011–12 as its base year.
3. It has a significant weight in the Index of Industrial Production.
Which of the statements given above are correct?
Correct
Answer: A
Explanation:
ICI is released by DPIIT, not MoSPI.
Base year is 2011–12.
It carries ~40% weight in IIP, hence very influential.
Incorrect
Answer: A
Explanation:
ICI is released by DPIIT, not MoSPI.
Base year is 2011–12.
It carries ~40% weight in IIP, hence very influential.
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Question 6 of 7
6. Question
With reference to the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft, consider the following statements:
1. MAVEN was launched to study the upper atmosphere and ionosphere of Mars.
2. MAVEN’s observations established that solar wind stripping significantly contributed to the loss of Mars’ atmosphere.
3. MAVEN is a joint mission of NASA and ISRO.
4. MAVEN’s findings help explain why liquid water cannot exist on present-day Mars.
Which of the statements given above are correct?
Correct
Answer: A
Explanation:
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- MAVEN’s primary objective is to study the upper atmosphere, ionosphere and solar interactions of Mars.
- MAVEN provided strong evidence that solar wind erosion, in the absence of a global magnetic field, stripped away much of Mars’ atmosphere.
- MAVEN is a NASA-only mission. ISRO’s Mars mission is the Mars Orbiter Mission (MOM/Mangalyaan), which is separate.
- Atmospheric thinning reduced surface pressure and temperature, explaining the loss of stable liquid water on Mars.
Incorrect
Answer: A
Explanation:
-
- MAVEN’s primary objective is to study the upper atmosphere, ionosphere and solar interactions of Mars.
- MAVEN provided strong evidence that solar wind erosion, in the absence of a global magnetic field, stripped away much of Mars’ atmosphere.
- MAVEN is a NASA-only mission. ISRO’s Mars mission is the Mars Orbiter Mission (MOM/Mangalyaan), which is separate.
- Atmospheric thinning reduced surface pressure and temperature, explaining the loss of stable liquid water on Mars.
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Question 7 of 7
7. Question
Under the PESA Act, Gram Sabha approval is mandatory for which of the following?
1. Land acquisition in Scheduled Areas
2. Grant of mining leases for minor minerals
3. Control over local markets
4. Declaration of wildlife sanctuaries
Select the correct answer using the code below:
Correct
Answer: A
Explanation:
-
- Land acquisition requires consultation/consent.
- Minor minerals regulated by Gram Sabha.
- Control over local markets is a PESA provision.
- Wildlife sanctuary declaration is not a Gram Sabha power under PESA.
Incorrect
Answer: A
Explanation:
-
- Land acquisition requires consultation/consent.
- Minor minerals regulated by Gram Sabha.
- Control over local markets is a PESA provision.
- Wildlife sanctuary declaration is not a Gram Sabha power under PESA.
